Joseph e



(No Model.)

J.R.HEBERT.

LOOSE FLY WHEEL FDR SEWING MACHINES. v No. 268,226. Patented Nov. 28,1882.

UNITED STATES PATENT OFFICE.

JOSEPH R. HEBERT, OF BROOKLYN, NEW YORK, ASSIGNOR TO ELIAS'A. I

WILKINSON, OF NEWARK, NEW JERSEY.

LOOSE FLY-WHEEL FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 268,226, dated November28, 1882.

7 Application filed May 6,1862. (No model.)

To all whom it may concern Be it known that I, JOSEPH R. HEBERT, ofBrooklyn, New York, have invented a new, useful. and importantImprovement in Loose Fly- Wheels for Sewing-Machines, described in thisspecification and the drawings thereof.

The invention consists of improvements relating to mechanism forstopping andstarting sewing mechanism while the treadle andflywheel tooperate the same continuein motion.

Figure l is a longitudinal section of the improvement. Figs. 2, 3,4, 5,and 6 are detail views of the same. I

In the form of construction shown a flywheel, A, of asevring-machine isplacedloosely upon a drivingshaft, B. The end of the driving-shaft hasslots a b, into which is placed a spring-fork, 0, against aretracting-spring, d, p aced in a recess in the end of the drivingshaftxAgainst the fly-wheel, on the drivingshaft, over the spring-fork,isplaced a washer, O, held to the shaft by a setscrew, e, and having aslot, j, which receives the pin g to limit the movement of theadjusting-nut D, which is screwed onto the end of the driving-shaft.When the adjusting-nut is screwed up close to thew-asher the spring-forkis forced inwardly and [1pwardly,and by friction locks the flywheel tothe driving-shaft. When the adjusting-nut is screwed back from thewasher the fiy-wheel is released. Consequently when the flywheel is inmotion and locked to the driving -shaft any connected sewing mechanismwould be operated, and when released, as afora said, such mechanismwould not be operated. Therefore by manipulating the adjusting-nuteither objectcan be attained, and stitching can be stopped or started asdesired, at the will of the operator, in case of accident to needle orthread in sewing or for winding bobbins, with- 4.0 out stopping thetreadle movement.

The details of construction may be varied within the scope of myimprovement.

I claim as my invention-- 1. The combination of fly-wheel A, shaft B, 5having grooves a b, spring-fork 0, retractingspring (I, washer 0, havingslot], and adjusting-nut D, having pin 9, substantially as set forth.

2. The combination ofafly-wheel,adriving- 5o shaft having side slots, aspring-fork in the side slots and in connection with a retractingspring.a washer having a limiting-slot, and an adjusting-nut over thespring-fork on the end of the shaft and limited'iu its movement 55 bythe limiting-pin in the limiting-slot, substantially as set forth.

